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%{
# include <string>
# include "buildparser.h"
# include "build.tab.h"
# include "stringrep.h"
std::string strbuf;
%}
%x strsq
%x strdq
%x comment
%option noyywrap nounput batch debug
%{
# define YY_USER_ACTION yylloc->last_column += yyleng;
%}
%%
[,:=[\]()] return yytext[0];
"+=" return TOK_ADDSET;
"default" return TOK_DEFAULT;
"action" return TOK_ACTION;
"rule" return TOK_RULE;
"requires" return TOK_REQUIRES;
"set" return TOK_SET;
"matches" return TOK_MATCHES;
"perform" return TOK_PERFORM;
"produces" return TOK_PRODUCES;
"check" return TOK_CHECK;
"clean" return TOK_CLEAN;
"target" return TOK_TARGET;
"input" return TOK_INPUT;
"filter" return TOK_FILTER;
"prefix" return TOK_PREFIX;
\n+ {
yylloc->last_line += yyleng;
yylloc->first_line = yylloc->last_line;
yylloc->first_column = yylloc->last_column = 0;
}
[ \t\r]* {
yylloc->first_line = yylloc->last_line;
yylloc->first_column = yylloc->last_column+1;
}
"#".* /* single line comment */
[a-zA-Z][a-zA-Z0-9]* {
{
if( bld.isTarget( yytext ) )
{
yylval->strval = stringdup( yytext );
return TARGETTYPE;
}
else if( bld.isPerform( yytext ) )
{
yylval->strval = stringdup( yytext );
return PERFORM;
}
else if( bld.isFunction( yytext ) )
{
yylval->strval = stringdup( yytext );
return FUNCTION;
}
bld.error( yylloc, "Invalid token" );
}
}
\" {
BEGIN( strdq );
strbuf = "";
}
\' {
BEGIN( strsq );
strbuf = "";
}
<strdq>[^\\\n\"]+ {
strbuf += yytext;
}
<strsq>[^\\\n\']+ {
strbuf += yytext;
}
<strdq,strsq>\\n strbuf += "\n";
<strdq,strsq>\\t strbuf += "\t";
<strdq,strsq>\\r strbuf += "\r";
<strdq,strsq>\\b strbuf += "\b";
<strdq,strsq>\\f strbuf += "\f";
<strdq,strsq>\\\\ strbuf += "\\";
<strdq,strsq>\\\" strbuf += "\"";
<strdq,strsq>\\\' strbuf += "\'";
<strdq,strsq>\\. bld.error( yylloc, "Invalid escape sequence.");
<strdq>\" {
BEGIN( INITIAL );
yylval->strval = stringdup( strbuf.c_str() );
return STRING;
}
<strsq>\' {
BEGIN( INITIAL );
yylval->strval = stringdup( strbuf.c_str() );
return STRING;
}
. {
char buf[] = {"Character x is out of place"};
buf[10] = yytext[0];
bld.error( yylloc, buf );
}
%%
void BuildParser::scanBegin()
{
yy_flex_debug = false;
if( !(yyin = fopen( file.c_str(), "r" )) )
{
error( std::string("cannot open file: ") + file );
}
}
void BuildParser::scanEnd()
{
fclose( yyin );
}
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